#error genesis/config.h (or sbcl.h) must be included before this file
#endif
+#include "interr.h" /* for declaration of lose() */
+
#define ARCH_HAS_STACK_POINTER
+#define ALIEN_STACK_GROWS_DOWNWARD
/* FIXME: Do we also want
* #define ARCH_HAS_FLOAT_REGISTERS
* here? (The answer wasn't obvious to me when merging the
* architecture-abstracting patches for CSR's SPARC port. -- WHN 2002-02-15) */
-extern never_returns lose(char *fmt, ...);
+#define COMPILER_BARRIER \
+ do { __asm__ __volatile__ ( "" : : : "memory"); } while (0)
+
+#ifdef LISP_FEATURE_WIN32
+extern int os_number_of_processors;
+#define yield_on_uniprocessor() \
+ do { if (os_number_of_processors<=1) SwitchToThread(); } while(0)
+#else
+/* Stubs are better than ifdef EVERYWHERE. */
+#define yield_on_uniprocessor() \
+ do {} while(0)
+#endif
-static inline void
-get_spinlock(volatile lispobj *word,long value)
+
+static inline void
+get_spinlock(volatile lispobj *word, unsigned long value)
{
#ifdef LISP_FEATURE_SB_THREAD
u32 eax=0;
- if(*word==value)
- lose("recursive get_spinlock: 0x%x,%ld\n",word,value);
+ if(*word==value)
+ lose("recursive get_spinlock: 0x%x,%ld\n",word,value);
do {
- asm ("xor %0,%0\n\
- lock cmpxchg %1,%2"
- : "=a" (eax)
- : "r" (value), "m" (*word)
- : "memory", "cc");
+#if defined(LISP_FEATURE_DARWIN)
+ asm volatile ("xor %0,%0;\n\
+ lock/cmpxchg %1,%2"
+ : "=a" (eax)
+ : "r" (value), "m" (*word)
+ : "memory", "cc");
+#else
+ if (eax!=0) {
+ asm volatile("rep; nop");
+ }
+ asm volatile ("xor %0,%0\n\
+ lock cmpxchg %1,%2"
+ : "=a" (eax)
+ : "r" (value), "m" (*word)
+ : "memory", "cc");
+#endif
+ yield_on_uniprocessor();
} while(eax!=0);
#else
*word=value;
static inline void
release_spinlock(volatile lispobj *word)
{
+ /* See comment in RELEASE-SPINLOCK in target-thread.lisp. */
+ COMPILER_BARRIER;
*word=0;
+ COMPILER_BARRIER;
}
+static inline lispobj
+swap_lispobjs(volatile lispobj *dest, lispobj value)
+{
+ lispobj old_value;
+#if defined(LISP_FEATURE_DARWIN)
+ asm volatile ("lock/xchg %0,(%1)"
+ : "=r" (old_value)
+ : "r" (dest), "0" (value)
+ : "memory");
+#else
+ asm volatile ("lock xchg %0,(%1)"
+ : "=r" (old_value)
+ : "r" (dest), "0" (value)
+ : "memory");
+#endif
+ return old_value;
+}
+
+extern void fast_bzero_detect(void *, size_t);
+extern void (*fast_bzero_pointer)(void *, size_t);
+
#endif /* _X86_ARCH_H */